[FIX] mail: translation of custom layout

- Create a PO for a French customer
- Send by email

The body of the email is in French, but some parts (such as the View
button or the footer) are not translated.

The body is translated following the field `lang` of the email template,
in this case `${object.partner_id.lang}`. This is done when opening the
mail composer (so the message appears in French). However, other parts
are rendered only when sending: at this point, the language to be used
in the template is lost forever in the darkness.

To avoid this, we keep a specific context key `custom_layout_lang` that
we retrieve when rendering the custom layout.

opw-1908420

0 files changed, 0 insertions, 0 deletions